Ship level monitoring system

Abstract

The invention provides a ship level monitoring system. The monitoring system comprises a level monitoring server, a communication converting module, a subsidiary monitoring station for a CAN general level and a fibre-optical grating level sensor. The subsidiary monitoring station for the CAN general level reads a pressure signal from the fibre-optical grating level sensor, converts the pressure signal into a level value, and sends the level value to the level monitoring server through the communication converting module to complete determinations of ship levels. The ship level monitoring system has the advantages of high precision of determination, wide range and high safety.

Description

technical field [0001] The invention belongs to the field of ship measurement, and in particular relates to a ship liquid level monitoring system. Background technique [0002] The liquid level in each tank of the ship is an important technical indicator that needs to be monitored in real time during loading and unloading and navigation. The liquid level exceeds the normal operating range or violent shaking will affect the safety of the ship, so the liquid level monitoring system is essential. [0003] The current methods for monitoring the liquid level of ship tanks include the following: [0004] The artificial visual monitoring method is to put the ruler into the liquid tank, read the liquid level directly or measure the liquid level through the traces on the ruler. Although this method is simple, direct, and low in cost, it has poor reliability, high labor intensity, and is not convenient for remote monitoring, without data output, and is not convenient for other contro...

AI Technical Summary

Problems solved by technology

The liquid level monitoring system using the radar liquid level sensor also has defects. First, the radar liquid level sensor has a complex structure and is expensive, and if a metal heating coil is arranged in the liquid tank, its reflection intensity to the radar wave is often greater than that of the liquid surface. The reflection intensity of radar waves will affect the measurement results, so the horn-shaped radar liquid level sensor cannot measure the liquid level below the metal heating coil

Moreover, if you measure volatile liquids such as asphalt and crude oil, you need to regularly clean up the condensed residue at the radar launch port, which is difficult to maintain

The radar liquid level sensor must have a certain distance from the liquid surface for electromagnetic wave transmission, so there is a blind area for liquid level measurement. At the same time, if the distance is too small, the time interval between transmitting electromagnetic waves and receiving electromagnetic waves is too short, and the error of time measurement will have a greater impact on the measurement accuracy. big impact

The radar liquid level sensor contains a large number of electronic components, and if long-distance measurement requires a long control cable, this brings difficulties to the explosion protection of the system

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